US5452155A - Tape cassette loading apparatus having tape slack take-up mechanism - Google Patents

Tape cassette loading apparatus having tape slack take-up mechanism Download PDF

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Publication number
US5452155A
US5452155A US08/357,539 US35753994A US5452155A US 5452155 A US5452155 A US 5452155A US 35753994 A US35753994 A US 35753994A US 5452155 A US5452155 A US 5452155A
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US
United States
Prior art keywords
tape
cassette
take
lever
reel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US08/357,539
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English (en)
Inventor
Shuichi Tojo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JVCKenwood Corp
Original Assignee
Victor Company of Japan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to US08/357,539 priority Critical patent/US5452155A/en
Application granted granted Critical
Publication of US5452155A publication Critical patent/US5452155A/en
Assigned to JVC Kenwood Corporation reassignment JVC Kenwood Corporation MERGER (SEE DOCUMENT FOR DETAILS). Assignors: VICTOR COMPANY OF JAPAN, LTD.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/43—Control or regulation of mechanical tension of record carrier, e.g. tape tension
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/16—Control of operating function, e.g. switching from recording to reproducing by sensing presence, absence or position of record carrier or container
    • G11B15/17—Control of operating function, e.g. switching from recording to reproducing by sensing presence, absence or position of record carrier or container of container
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/675—Guiding containers, e.g. loading, ejecting cassettes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04—Magazines; Cassettes for webs or filaments
    • G11B23/08—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
    • G11B23/087—Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using two different reels or cores
    • G11B23/08707—Details
    • G11B23/08721—Brakes for tapes or tape reels

Definitions

  • the present invention relates to improvements of a tape cassette loading system equipped in a magnetic recording and/or reproducing apparatus, for loading a tape cassette accommodating a magnetic tape wound around a pair of tape reels, and it particularly relates to a tape cassette loading system having a tape slack take-up mechanism capable of taking-up a tape slack of the magnetic tape occurring in the tape cassette by rotating at least one of the tape reels within the tape cassette, when the tape cassette is loaded in the cassette loading system equipped in the apparatus.
  • VTR Video Tape Recorder
  • R-DAT Rotary head Digital Audio Tape recorder
  • the tape cassette Upon a recording or a reproducing operation, the tape cassette is first loaded in a cassette loading device of the apparatus, then is automatically transferred to a predetermined set position by a transferring operation of the cassette loading device by a cassette transfer mechanism, while a front lid of the tape cassette is rotated upward to open by a lid opening mechanism. A segment of the magnetic tape being between the pair of tape reels is positioned just behind the front lid with its closed position.
  • a pair of loading poles enters into a mouth provided at a bottom of the cassette to intercept and engage with the tape segment to draw it out of the cassette with its lid being open, subsequently, the loading poles move respectively to predetermined positions so as to bring the magnetic tape obliquely around a rotary head drum in a predetermined range. Then, recording or reproducing of signals on or from the magnetic tape is performed by rotary magnetic heads fixed to the rotary head drum.
  • FIG. 1 is a plan view showing a tape cassette in which a magnetic tape has a tape slack.
  • a magnetic tape 101 is accommodated in the cassette 100 in such a manner that both ends of the magnetic tape 101 are respectively wound around and anchorred to a pair of tape reels, a supply reel 102 and a take-up reel 103.
  • the tape segment 101a between the tape reels 102, 103 contacts guide rollers 104, 106 disposed behind a lid 105 which can be rotated upwards to open.
  • a tape reel brake mechanism (not shown) utilizing friction or the like is used in the cassette 100 to prevent the tape segment 101a from unintended rotation of the reels and developing tape slacks in order not to disturb the insertion of the loading poles upon the tape loading.
  • a general object of the present invention is to provide a novel and useful tape cassette loading system in which the above problems have been eliminated.
  • a more specific object of the present invention is to provide a tape cassette loading system having a tape slack take-up mechanism in a magnetic recording and/or reproducing apparatus in order to remove a tape slack developing in the tape cassette upon loading the tape cassette.
  • Another and more specific object of the present invention is to provide a tape cassette loading system equipped in a magnetic recording and/or reproducing apparatus for loading a tape cassette into the apparatus.
  • the tape cassette used in the present invention generally comprises a cassette case having a front lid at a front thereof, a pair of tape reels accommodating a magnetic tape thereon within the cassette case and a window formed on a side wall of the cassette case to expose at least one of the reel flanges of the tape reels so that the reel flange is engagaeble with a reel driving system of the apparatus.
  • the tape cassette loading system comprises a cassette holder having a frame body, on which cassette holder the tape cassette is loaded, and a tape slack take-up mechanism provided on the cassette holder at a position corresponding to the window of the cassette case.
  • FIG. 1 is a plan view showing a generally known tape cassette in which a magnetic tape has a tape slack.
  • FIG. 2 is a perspective view showing a tape cassette adopted in an embodiment of the present invention from a bottom side of the tape cassette.
  • FIG. 3 is a cross-sectional view showing the tape cassette in FIG. 1., which is related to a main part of the present invention.
  • FIG. 4 is a perspective view showing a whole structure of a cassette loading system which is the main part of the present invention.
  • FIG. 5 is an enlarged perspective view showing a tape slack take-up mechanism illustrated in FIG. 4.
  • FIG. 6 through FIG. 9 are plan views for explaining operations of the tape slack take-up mechanism illustrated in FIG. 4 and 5.
  • FIG. 2 is a perspective view showing a tape cassette adopted in an embodiment of the present invention from a bottom side of the tape cassette.
  • FIG. 3 is a cross-sectional view showing the tape cassette in FIG. 1.
  • the tape cassette 1 adopted in the embodiment of the present invention comprises a cassette case 2 consisting of an upper half 3a and a lower half 2b, a front lid 9 provided at a front of the upper half 3a to cover the front part of the cassette case 2, a mouth (opening) 2d formed at the lower half 2b behind the front lid 9 for permitting an insertion of loading poles, a supply reel 4 and a take-up reel 5 for accommodating magnetic tape 8.
  • the supply reel 4 comprises a pair of flanges, an upper flange 4a and a lower flange 4b, made of circular discs, and a cylindrical hub 4c interposed between the upper and lower flanges 4a, 4b which are facing each other. Further, the supply reel 4 is provided with an engaging hole 4d opened through a bottom 2a of the lower half 2b for engagement with a driving shaft of the apparatus (not shown). The supply reel 4 is movably disposed in the cassette ease 2 in a manner that the engaging hole 4d is accessible by the driving shaft through the hole 2a1 provided in the bottom 2a of the lower half 2b.
  • the take-up reel 5 comprises a pair of flanges, an upper flange 5a and a lower flange 5b, and a cylindrical hub 5c interposed between the upper and lower flanges 5a, 5b which are facing each other.
  • the lower flange 5b of the take-up reel 5 is provided with a gear portion 5b1 at a periphery thereof for engaging with a take-up reel driving device of the apparatus (not shown).
  • the take-up reel 5 is rotatably mounted on an axle 6 provided perpendicularly on the bottom plate 2a of the lower half 2b within the cassette case 2.
  • a slightly bent leaf spring 7 is provided across a ceiling of the upper half 3a in such manner that the distal ends of the leaf spring 7 exert small resilient forces downward on the take-up reel 5 and the supply reel 4, respectively.
  • a side window 2c is formed along a side wall of the lower half 2b extending to the bottom plate 2a thereof to expose and engage the gear portion 5b1 of the take-up reel 5 with a tape slack take-up mechanism 20 of a cassette loading system 10 shown in FIG. 4, which will be described hereafter.
  • the side window 2c is composed of 2 openings, a rectangular opening 2c2 formed on the side wall and a trapezoid opening 2c1 formed on the bottom plate 2a.
  • the above gear portion 5b1 can be formed on the periphery of the upper flange 5a of the take-up reel 5 and the window 2c can be formed nearby the upper flange 5a, instead.
  • the same gear portion as the gear portion 5b1 can also be made on a periphery of either upper or lower flange 4a, 4b of the supply reel 4 and the same opening as the side window 2c nearby the gear portion.
  • a magnetic tape 8 is accommodated in the cassette 2 in such a manner that both ends of the magnetic tape 8 are respectively wound around and anchored to the pair of tape reels, the supply reel 4 and the take-up reel 5.
  • a tape segment 8a between the tape reels 4, 5 is positioned along the back wall of a front lid 9 which is rotatably mounted on the front of the cassette case 2 to cover the tape segment 8a of the magnetic tape 8.
  • 2d designates a mouth or opening to permit an insertion of tape loading poles of the apparatus (not shown).
  • FIG. 4 is a perspective view showing a whole structure of a cassette loading system 10 which is the main part of the present invention.
  • FIG. 5 is an enlarged perspective view showing a tape slack take-up mechanism 20 illustrated in FIG. 4.
  • FIG. 6 through FIG. 9 are plan views for explaining operations of a tape slack take-up mechanism 20 to take-up a tape slack in a tape cassette.
  • an embodiment of the cassette loading system 10 generally comprises a cassette holder 11 made of a frame body for mounting the aforementioned tape cassette 1 (shown with two-dot chain line), and a tape slack take-up mechanism 20 rigidly provided on a right side wall 11c of the cassette holder 11, which tape slack take-up mechanism 20 has a function of taking-up a tape slack developed in the tape cassette 1.
  • the cassette holder 11 is connected to a holder transferring mechanism (not illustrated for simplicity) which transfers the cassette holder 11 in arrow directions A then B to set the cassette holder 11 to a predetermined position.
  • the cassette holder 11 is made of a metal frame, and is provided with a left side wall 11b and the right side wall 11c which are bent perpendicularly upward from the both sides of a bottom plate 11a, respectively. Further, the right and left side wall 11b, 11c are respectively provided with guide parts 11b1, 11c1 which are horizontally bent in a manner that each of the distal ends of the guide parts 11b1, 11c1 opposes each other to assist a correct insertion of the tape cassette 1 into the cassette holder 11.
  • the bottom plate 11a is provided with a large left hole 11a1 and a large right hole 11a2 so as to oppose the supply reel 4 and the take-up reel 5, respectively, for allowing engagement with a reel driving mechanism of the apparatus and with the tape slack take-up mechanism 20 when the tape cassette 1 is mounted on the cassette holder 11. Further, the bottom plate 11a is provided with stoppers 11a3, 11 a4 at a rear end thereof so that the stoppers 11a3, 11a4 can engage with the contacting part 2e1, 2e2 (FIG. 2)of the cassette tape 1, a height of the stoppers 11a3, 11a4 being low enough not to obstruct the opening of the front lid 9 of the tape cassette 1 by a lid opening mechanism of the apparatus (not shown). Furthermore, the right side wall 11c is provided with a side opening 11c2 as a vertical part extended from the right large hole 11a2, where the tape slack take-up mechanism 20 is provided.
  • FIG. 5 is an enlarged perspective view of a tape slack take-up mechanism 20.
  • a holding member 21 made of a resin body comprises a cylindrical member 21a, attachment plates 21b, 21c protrudingly provided on the sides of the cylindrical member 21a, respectively.
  • One end of a long shaft 22 is press-fitted into the the cylindrical member 21a and the other end of the shaft 22 protrudes downward from the bottom of the cylindrical member 21a.
  • the attachment plates 21a, 21b are respectively provided with screw holes 21b1 and 21c1 for attaching the tape slack take-up mechanism 20 to the right side wall 11c of the cassette holder 11 at an upper position of the side opening 11c2. Accordingly, the holding member 2l is stationary with respect to the cassette holder 11, being mounted thereon.
  • a first coil spring 23, a detection lever 24 for detecting the tape cassette 1, a second coil spring 25 and a take-up lever 26 are mounted on the shaft 22 in order, and they are prevented from slipping off from the shaft 22 by a stopping washer 27 at the end of the shaft.
  • One end 23a of the first coil spring 23 is engaged with the attachment plate 21b and the other end 23b of the first coil spring 23 is engaged with an arm portion 24b of the detection lever 24.
  • the detection lever 24 integrally made of a resin body comprises a cylindrical part 24a having a hole (not shown) through which the shaft 22 is inserted, an arm portion 24b at the right side of the cylindrical part 24a and an engaging part 24c at the left side of the cylindrical part 24a.
  • the detection lever 24 is rotatably biased in a counter-clockwise direction (arrow D 1 ) around the center of the shaft 22, by the first coil spring 23, however, a rotation of the detection lever 24 is restricted by contacting a part 24b1 of the arm portion 24b with a tapered part 21c2 of the attachment plate 21c.
  • the detection lever 24 is rotated in the clockwise direction (the arrow D2) against a biasing force of the coil spring 23 with a distal end 24b2 of the arm 24b being engaged and displaced by the tape cassette 1. Further, the engaging part 24c of the detection lever 24 protrudes downward from the cylindrical part 24a and the engaging part 24c is engaged with a back wall of a lever 26b of the tape take-up lever 26 which will be described hereafter.
  • One distal end 25a of the second coil spring 25 is engaged with the arm portion 24b of the detection lever 24, and the other distal end 25b of the second coil spring 25 is engaged with the lever 26b of the take-up lever 26.
  • the take-up lever 26 comprises a rigid cylindrical member 26a through which the shaft 22 is inserted at the center thereof and the lever 26b made of a thin plate provided at the left side of the cylindrical member 26a, which lever can elastically be displaced by an external force.
  • the end portion of the lever 26b is bent to form a U-shaped configuration, and a distal end of the U-shaped configuration is provided with a triangular pawl 26c protruding slightly upward.
  • the take-up lever 26 is biased in the clockwise direction (the arrow E1) by the force of the second coil spring 25 around the shaft 22, however, the rotation of the lever 26b is restricted by engaging with the engaging part 24c of the detection lever 24.
  • FIG. 6 shows an initial state of the tape loading system 10 where the tape cassette 1 is not loaded into the cassette holder 11.
  • the arm portion 24b of the detection lever projects into the inside of the tape holder 11 from the right side wall 11c.
  • the lever 26b provided with the triangular pawl 26c is positioned nearby the right side wall 11c of the cassette holder 11.
  • FIG. 7 shows a loading state where the tape cassette 1 is halfway loaded into the tape holder 11.
  • the detection lever 24 is rotated in the clockwise direction around the shaft 22 against the biasing force of the first coil spring 23 by being pushed by the front lid 9 of the tape cassette 1 which is loaded halfway in the direction of the arrow C. Therefore, the engaging part 24c of the detection lever 24 is also rotated in the clockwise detection, so that the lever 26b of the take-up lever 26 is rotated in the clockwise direction by the biasing force of the second coil spring 25, following to the motion of the engaging part 24c, and the triangular pawl 26c of the take-up lever 26 is engaged with the gear portion 5b1 of the lower flange 5b of the take-up reel 5.
  • the gear portion 5b1 resides nearby the side opening 2c2 of the tape cassette 1, in which a tape slack of the magnetic tape 8 is seen behind the front lid 9.
  • FIG. 8 shows a loading state where the tape cassette 1 is further inserted in the direction of arrow C than in FIG. 7.
  • the take-up reel 5 is rotated in the clockwise direction (the arrow F) by the friction exerted between the triangular pawl 26c of the take-up lever 26 and the gear portion 5b1 of the lower flange 5b.
  • the tape slack (if any) of the magnetic tape 8 is taken-up by the rotation of the take-up reel 5 and the magnetic tape 8 behind the front lid 9 is tightened to be straight.
  • the tape cassette 1 has the gear portion 5b1 at the periphery of the lower flange 5b to engage with a driving mechanism (not shown) of the apparatus, so that a larger friction occurs between the pawl 26c and gear portion 5b1 because of such a jagged structure of the gear portion 5b1.
  • a driving mechanism not shown
  • FIG. 9 shows a loading state where the tape cassette 1 is completely loaded into the cassette holder 11.
  • the tape cassette 1 is restricted by the stoppers 11a3, 11a4, and the pawl 26c is disengaged from the gear portion 5b1 and retracted to the right side wall 11c of the cassette holder 11.
  • the pawl 26c which slides on an edge of the trapezoid opening 22c1, is displaced back to the right side wall 11c (in the direction of arrow E 2 of FIG. 5) as the tape cassette 1 travels toward the fully loaded position shown in FIG. 9.
  • the tape slack of the magnetic tape 8 is thoroughly taken-up by the take-up reel 5.
  • the pawl 26c of the take-up lever 26 may be engaged with the periphery of the upper flange 5a instead of that of the lower flange 5b.
  • a tape slack take-up mechanism of asymmetrical design with respect to the tape slack take-up mechanism 20 may be provided to the left side wall lib to cause the supply reel 4 to take-up the tape slack by rotating it counter-clockwise.
  • the tape slack developed within a tape cassette prior to loading the cassette can be taken-up by an operation of the tape slack take-up mechanism upon loading of the tape cassette, so that subsequent operations, such as the tape loading operation mentioned of the prior art can be securely performed.
  • the present invention permits the realization of a reliable magnetic recording and/or reproducing apparatus without causing damage to the magnetic tape accommodated in the tape cassette.

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US08/357,539 1991-05-31 1994-12-16 Tape cassette loading apparatus having tape slack take-up mechanism Expired - Lifetime US5452155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US08/357,539 US5452155A (en) 1991-05-31 1994-12-16 Tape cassette loading apparatus having tape slack take-up mechanism

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3155372A JPH04355251A (ja) 1991-05-31 1991-05-31 テープ収納筐体装着装置
JP3-155372 1991-05-31
US88952592A 1992-05-27 1992-05-27
US08/357,539 US5452155A (en) 1991-05-31 1994-12-16 Tape cassette loading apparatus having tape slack take-up mechanism

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US88952592A Continuation 1991-05-31 1992-05-27

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US5452155A true US5452155A (en) 1995-09-19

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US08/357,539 Expired - Lifetime US5452155A (en) 1991-05-31 1994-12-16 Tape cassette loading apparatus having tape slack take-up mechanism

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US (1) US5452155A (ja)
EP (1) EP0516469B1 (ja)
JP (1) JPH04355251A (ja)
DE (1) DE69215757T2 (ja)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2013052A1 (ja) * 1968-07-16 1970-03-27 Cartridge Television Inc
FR2352369A1 (fr) * 1976-05-19 1977-12-16 Matsushita Electric Industrial Co Ltd Appareil d'enregistrement et/ou reproduction sur bande magnetique
GB2104872A (en) * 1981-06-30 1983-03-16 Victor Company Of Japan Tape cassette having a reel displacement limiting mechanism
US4432510A (en) * 1981-01-20 1984-02-21 Victor Company Of Japan, Ltd. Tape cassette
US4567536A (en) * 1982-05-31 1986-01-28 Victor Company Of Japan, Ltd. Adapter for a miniature type tape cassette
JPS63193370A (ja) * 1987-02-06 1988-08-10 Toshiba Corp カセツトホルダ装置
GB2237678A (en) * 1989-11-02 1991-05-08 Tanashin Denki Co Tape tensioning device for a tape recorder
JPH03230351A (ja) * 1990-02-06 1991-10-14 Matsushita Electric Ind Co Ltd 磁気記録再生装置
US5140475A (en) * 1989-12-14 1992-08-18 Tanashin Denki Co., Ltd. Tape recorder with automatic pre-reproduction tape slack eliminating function
US5150265A (en) * 1990-01-31 1992-09-22 Tanashin Denki Co., Ltd. Tape tensioning device for tape recorder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57191912A (en) * 1981-05-20 1982-11-25 Fujitsu Ltd Electric contact
JPS60118853A (ja) * 1983-11-30 1985-06-26 Matsushita Electric Ind Co Ltd 画像形成方法
DE3602684A1 (de) * 1986-01-30 1987-08-06 Agfa Gevaert Ag Sperrmechanismus fuer videocassetten

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2013052A1 (ja) * 1968-07-16 1970-03-27 Cartridge Television Inc
FR2352369A1 (fr) * 1976-05-19 1977-12-16 Matsushita Electric Industrial Co Ltd Appareil d'enregistrement et/ou reproduction sur bande magnetique
US4432510A (en) * 1981-01-20 1984-02-21 Victor Company Of Japan, Ltd. Tape cassette
US4494161A (en) * 1981-01-20 1985-01-15 Victor Company Of Japan, Ltd. Tape cassette
GB2104872A (en) * 1981-06-30 1983-03-16 Victor Company Of Japan Tape cassette having a reel displacement limiting mechanism
US4567536A (en) * 1982-05-31 1986-01-28 Victor Company Of Japan, Ltd. Adapter for a miniature type tape cassette
JPS63193370A (ja) * 1987-02-06 1988-08-10 Toshiba Corp カセツトホルダ装置
GB2237678A (en) * 1989-11-02 1991-05-08 Tanashin Denki Co Tape tensioning device for a tape recorder
US5140475A (en) * 1989-12-14 1992-08-18 Tanashin Denki Co., Ltd. Tape recorder with automatic pre-reproduction tape slack eliminating function
US5150265A (en) * 1990-01-31 1992-09-22 Tanashin Denki Co., Ltd. Tape tensioning device for tape recorder
JPH03230351A (ja) * 1990-02-06 1991-10-14 Matsushita Electric Ind Co Ltd 磁気記録再生装置

Also Published As

Publication number Publication date
JPH04355251A (ja) 1992-12-09
EP0516469B1 (en) 1996-12-11
EP0516469A2 (en) 1992-12-02
EP0516469A3 (en) 1994-08-10
DE69215757D1 (de) 1997-01-23
DE69215757T2 (de) 1997-08-14

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